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Prev Professional Automotive Repair Technical Discussions for March 20, 2008
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Open Help Requests for GM
Help Request Answers
1993 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 2G1WL54T4P
Hello everyone, I need some help on this chev. Here is what I have. Vehicle came in not running very good and stalling. We checked it out and found a code 82 3X signal error. So we unplugged the ignition module 2-wire connector. We connected a test light betwe... Trouble codes: 82 (3X Signal Error)
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1995 Chevrolet Caprice Classic 5.7L No Start VIN: 1G1BL52W4S
well, this car is killing me! i replaced dist. module,replaced module connector. alldata tests tell me that the dfist. is bad in one test, another test tells me that the ground circut for module is open, the ground circut is fine,rewired it,cleaned all grounds... Trouble codes: 16 (lo res pulse circut)
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1997 Chevrolet C2500 Cheyenne 5.7L Hesitation, Poor Accel, VIN: 1GCGC29R2V
Customer is complaining of Poor acceleration when trying to pass other cars. There are no codes stored in any system. Engine runs smoothly and transmission will pass a stall test. Upon roadtesting transmission is down shifting, going in and out of overdrive, t...
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2000 Chevrolet Tracker 2.0L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 2CNBJ13C1Y
Hello everyone and thank you for your help ahead of time. We have a 2000 chevy tracker- this vehicle came in with a poor running condition after warmed up. Verified after 5 minutes of run time it starts to chug and will stall. Fuel pressure holds, coil firing ...
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2001 Chevrolet Impala 3.4L Hesitation, Poor Fuel Economy VIN: 2GIWF52E21
Hello this is my own vehicle the problem on this car, every time that I step on the gas pedal my car does not respond like it should all I heard is like a buzz in the intake (throttle) and it takes me a while to pick up speed does not misfire this morning fina... Trouble codes: P0404 (egr open position performance)
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2003 Chevrolet Astro 4.3L dome lights VIN: 1GNDM19X03
Dome lights stay on unless you use the over-ride switch on the headlight switch. Scanned for body data, showed that the rear door jam switch was closed (door open). Dealer sent us a normal door jam switch, but could not find one like it anywhere in sight. Remo...
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2004 Chevrolet Impala SS 3.8L engine VIN: 2G1WP52174
Hello fellow techs. I have the Impala SS 3.8l vin #1 w/ a supercharger. It has an engine noise (ticking)in the lifter galley. You can hear it at the bottom of intake and also in the block along (close to knock sensor) the oil pan rails. Pulled valve covers and...
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2004 Chevrolet Silverado 2500 HD 6.6L Poor Fuel Economy, MIL Lamp on VIN: 1GCHK23214
This Duramax gives a P0016 code. the data has a CMP miss PID that is constantly counting up. I have a good sensor pattern @ the computer so I installed a different one. Same problem. Can the CMP sensor be faulty & still give a good pattern? Is there something ... Trouble codes: P0016 (CKP/CMP corelation)
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1998 GMC K3500 Sierra SL 7.4L Poor Idle Quality, Surge, Stall, Misfire VIN: 1GTHK33J1W
customer just bought truck,complaint is rough surgy idle and sometimes stall at stops.he replaced iac,map sensor and plugs trying to fix.we found fuel filter plugged solid,we did an injector clean with GM cleaner,balance test and checked injector resistance wh...
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1994 Oldsmobile Cutlass Supreme S 3.4L Unknown VIN: 1G3WH55XXR
car came in with rear brakes grinding, pedal going to floor. inspected and found need for calipers, rotors and pads in rear. never test drove before repair due to safety issue. on test drive after repair found brake pedal hard at times, pedal fades but no abs ...
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1998 Oldsmobile Aurora 4.0L cooling system VIN: 1G3GR62C5W
This car is a headache. I have replaced two components to this cooling system and the car continues to intermittently overheat. The customer is the only one that can get it to overheat. I have let the car sit running for over an hour, ran it hard for 10 minute...
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1989 Pontiac Bonneville LE 3.8L MIL Lamp on VIN: 1G2HX54C1K
after module replacement corrected bc5 voltage,code reappeared.repeated step 1 ck voltage at cam sensor connector and now circuit A voltage changed from 10 volts to five while circuit C voltage remained normal.ck circuit 633,ok.after another module and a lot o... Trouble codes: 41 (cam signal)
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1997 Pontiac Trans Sport 3.4L Wheel Cylinders VIN: 1GMDX03E7V
12,000 km(1.5 years) ago Cust. bought vehicle and came in for checkup. Rear wheel Cylinders were leaking and contaminated the shoes. front pads were low and rotors slightly warped. Performed full brake service(new rotors, pads, shoes, Wheel Cyl, Hardware and b...
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2000 Pontiac Grand Am SE 3.4L valve train noise VIN: 1G2NG52E0Y
Ticking noise at cam speed (like one lifter gone bad) no engine miss Noise starts after engine warms up. When engine is cold, quiet as a church mouse. First we tried oil change with a qt of marvel- no luck. Opened both rocker covers, all roller rocker arms wer...
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1992 Saturn SL 1.9L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1SATURNLS2
This car lacks power on acceleration and doesn't want to go over 55mph. It is running rich above idle speeds and sets rich running code intermittently. It will go through 6 gal of gas in 60 miles. It starts good and idles good and nothing showing up on scanner...
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Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KE54Y5Y
3 DAY'S 72HOUR'S OFF AND ON AND A CUPPLE OF 6 PACK'S IT FIXED! THIS ONE WAS A LITTLE CRAZY. LIKE I SAID THE VEHICLE WAS MISSING ON #3 CYL AND SO I CHECKED COMPRESSON ON THAT CYLNDER AND IT WAS GOOD 150PSI (SPECS IS 140 TO 150) SO GRABED A NIOD LIGHT AND HAD PU... Trouble codes: P0303.
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1993 Chevrolet Corsica LT 3.1L Poor Idle Quality, Hesitation VIN: 1G1LT553T1
Thanks for all the advice and I have to say it came down to a multiple issue. First the intake gasket slid over on #3 and caused a leak, but also I checked a little deeper and found a bad lifter on #3 exhaust too. Replaced the lifter and intake gasket, Button...
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1994 Chevrolet Camaro 3.4L Excessive Emissions VIN: 2G1FP22S2R
Well, once again thanks for all the responses. Call this one fixed although we cheated. The linear EGR does not operate until the engine is under load. When the car was on the dyno I was able to watch the egr toggle. Every time the egr turned off the nox shot ...
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1999 Chevrolet Silverado 1500 4.3L brake lamp VIN: 1GCEK19V2Y
found pinched/chafed wire under the truck thanks iatn
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2003 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GNT13SX22
The variable cam requlator (FR on cyl head) has a screen that was fairly pluged as per Mikes post. This did not fix my misfire code but did help with fuel trim. Most other posts refer to bace eng problems especialy valve seats. The customer was going to get a... Trouble codes: P0302.
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1996 GMC K1500 Suburban 5.7L MIL Lamp on VIN: 3GKFK16R8T
Well, this rig never came back with any problem, so I am going to call it fixed for now at least. Some of the replies said that I might have intake leaks or some other fuel control problem, but I do not think this was the case since the fuel trims were near p... Trouble codes: P0157 (O2 B2S2 low voltage reading).
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1996 Oldsmobile LSS 3.8L MIL Lamp on VIN: 1G3HY52K5T
Hi Folks, This one is down the road. The 5 responses I got were all very helpful. As suggested I put a headlight bulb across the connector for the evap control solenoid to simulate the draw of that unit. The light came on while running the car but started bli... Trouble codes: 1655 (EVAP solenoid control circuit does not turn on MIL), 1654 (A/C relay control circuit turns on MIL after 2nd start).
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1999 Oldsmobile Alero GL 3.4L cluster/no start VIN: 1G3NL5273X
found water had seeped in behind the left hand fuse block, replace fuse block and customer had water leak at weinsheild fixed, everything working good for now
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2000 Oldsmobile Bravada 4.3L Misfire VIN: 1GHDT13W4Y
hi guys- i'm able to close this request with some added info. i tried shimming th crank sensor - as suggested by alex from Ga.. this did not help, i was aware of a tsb for that- but it didn't come up on this particular vehicle. roger from Alberta suggested a t...
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1999 Pontiac Grand Am SE 3.4L Steering VIN: 1G2NE52E1X
Thanks for the help. A couple of people thought that the rebuilt pump might be bad. Some had run into shafts that had broken on rebuilt pumps. Others thought it might be a bad flow control valve or the VES actuator. I talked with the owner again and learned th...
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2001 Pontiac Grand Am SE 2.4L No Start, Misfire VIN: 1G2NF52T11
I want to thank everyone for the response I got to this post. 18 people took the time to offer help and the majority of responses were dealing with the coil housing, excess oil pressure causing lifters to hold the valves open or jumped timing chain. As I state...
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2004 Saturn Ion-2 2.2L ignition switch VIN: 1G8AJ52F94
thanks to all who responded especially mark [...]. he hit it right on. the shifter was forced and bent. replaced with a used part. customer very happy! thanks again.
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